The market in late noon trades is witnessing a significant buying support. Strong surge in Reliance, SBI, tech and other select old economy stocks has propelled the gains of the index to a current high of 6,436.The Sensex has surged 64 points to 6,431. The Nifty has advanced 20 points to 2,018.Reliance has gained more ground, and has flared up 3.34% (Rs 18) to Rs 543. ITC is up a per cent (Rs 7) at Rs 1,284, while HLL is still marginally down at Rs 142.Infosys (up Rs 12 to Rs 2,055) has bounced back into the green after early losses. While Satyam has advanced 2.40% (Rs 9) to Rs 388, Wipro has added 1.56% (Rs 11) to Rs 700.SBI has scaled up 2.22% (Rs 13) to Rs 618. While HDFC Bank has inched up a per cent (Rs 5) to Rs 490, ICICI Bank is up 1.36% (Rs 5) at Rs 359.ONGC is trading off-highs with a gain of 1.49% (Rs 12) at Rs 796. Tisco is up 2.25% (Rs 8) at Rs 363.Gujarat Ambuja and ACC have moved up 2% each to Rs 425 (up Rs 9) and Rs 351 (up Rs 7), respectively. Grasim is marginally up at Rs 1,296.Bharti is down a rupee, after slipping over 4% since the mid-morning trades. While HDFC has lost 1.52% (Rs 11) to Rs 727, Reliance Energy is down 2% (Rs 11) at Rs 534. Zee (down Rs 4 or 2.58% to Rs 164) is still subdued.Metal stocks have risen sharply. Man Industries has notched up 7.33% gains (Rs 7) to Rs 107. While Lloyd Steel has firmed up 6.42% to Rs 14, Ispat is up 5% at Rs 22. PSL, Tata Metals, Jisco, Gujarat NRE Coke, Essar Steel, Sterlite Industries and Jindal Vijaynagar Steel are up in a range of 3-5%.Select counters have strengthened on the back of strong buying support. Petronet LNG has shot up 16.50% (Rs 6) to Rs 42, and Morepen Lab has flared up 10.75% to Rs 12.57. While Max India has surged 10.13% to Rs 295, Mid-day Multimedia has mopped up 9.92% gains to Rs 66. Avaya Global and NDTV are up 8% each at Rs 308 and Rs 140, respectively. West Coast Paper and Graphite India are also trading with steep gains.Alka India has topped the volume table with over 90.48 lakh shares traded, followed by Petronet LNG (81.21 lakh), Himachal Futuristics (60.44 lakh), Royal Airways (56.91 lakh) and Tata Tele (52.3 lakh), respectively.Reliance, with a turnover of Rs 143 crore, is leading the value chart, followed by Infosys (Rs 130 crore), Tisco (Rs 74 crore), SBI (Rs 57 crore) and Satyam (Rs 45 crore), respectively.